Leaked Intel documentation sheds light on upcoming Arrow Lake-S platform. It is emphasized that future desktop processors of the 15th generation (Arrow Lake) may not have support for Hyper-Threading (HT) technology. The white paper lists Arrow Lake’s expected 8 performance cores with no threads enabled via SMT. This is consistent with previous rumors of Hyper-Threading being abandoned.

The loss of Hyper-Threading can significantly impact Arrow Lake’s performance in multi-threaded applications compared to its Raptor Lake predecessors. According to estimates, HT provides acceleration of multi-threaded workloads by 10-15% using logical cores. However, in gaming, disabling HT has little effect, and in some cases may even increase frame rates. Thus, the Arrow Lake family can achieve Intel’s predicted increase in gaming performance by 30% only due to architectural improvements.

However, the abandonment of the traditional HT technology will most likely lead to the use of the new Profitable Units solution. This new approach is a response to the adoption of hybrid core architectures, which has seen a growing number of applications using low-power E-cores to improve performance and efficiency.

Profitable Units is a more efficient pseudo-multithreading solution that splits the first stream of incoming instructions into two parts, distributing them across different cores depending on complexity. Profitable Units will use timers and counters to measure P/E core usage and send portions of the stream to each core for processing. This inherently requires a larger cache size. Arrow Lake processors are rumored to have 3MB of L2 cache per core. Arrow Lake is also said to support faster DDR5-6400 memory.

Source: techpowerup